webpack/lib/dependencies/LabeledModuleDependencyParserPlugin.js

Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jade, coffee, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/
var AbstractPlugin = require("../AbstractPlugin");
var LabeledModuleDependency = require("./LabeledModuleDependency");
var LabeledExportsDependency = require("./LabeledExportsDependency");

module.exports = AbstractPlugin.create({
	"label require": function(stmt) {
		if(stmt.body.type !== "ExpressionStatement") return;
		switch(stmt.body.expression.type) {
		case "Literal":
			var param = this.evaluateExpression(stmt.body.expression);
			return this.applyPluginsBailResult("label require:item", stmt, param);
		case "SequenceExpression":
			stmt.body.expression.expressions.forEach(function(expression) {
				var param = this.evaluateExpression(expression);
				return this.applyPluginsBailResult("label require:item", stmt, param);
			}, this);
			return true;
		}
	},
	"label require:item": function(stmt, param) {
		if(param.isString()) {
			var dep = new LabeledModuleDependency(param.string, stmt.range);
			dep.loc = stmt.loc;
			dep.optional = !!this.scope.inTry;
			this.state.current.addDependency(dep);
			return true;
		}
	},
	"label exports": function(stmt) {
		switch(stmt.body.type) {
		case "VariableDeclaration":
			stmt.body.declarations.forEach(function(decl) {
				if(!decl.init) return;
				var dep = new LabeledExportsDependency(decl.id.name, decl.init.range[0]);
				dep.loc = stmt.loc;
				this.state.current.addDependency(dep);
				if(!this.state.module.meta.exports) this.state.module.meta.exports = [];
				this.state.module.meta.exports.push(decl.id.name);
			}, this);
			return true;
		case "FunctionDeclaration":
			var name = stmt.body.id.name;
			var dep = new LabeledExportsDependency(name, stmt.body.range[0]);
			dep.loc = stmt.loc;
			this.state.current.addDependency(dep);
			if(!this.state.module.meta.exports) this.state.module.meta.exports = [];
			this.state.module.meta.exports.push(name);
			return true;
		case "ExpressionStatement":
			if(stmt.body.expression.type ===  "Identifier") {
				var name = stmt.body.expression.name;
				var dep = new LabeledExportsDependency(name, stmt.body.expression.range[0]);
				dep.loc = stmt.loc;
				this.state.current.addDependency(dep);
				if(!this.state.module.meta.exports) this.state.module.meta.exports = [];
				this.state.module.meta.exports.push(name);
				return true;
			} else if(stmt.body.expression.type === "SequenceExpression") {
				stmt.body.expression.expressions.forEach(function(e) {
					if(e.type !== "Identifier") return;
					var name = e.name;
					var dep = new LabeledExportsDependency(name, e.range[0]);
					dep.loc = stmt.loc;
					this.state.current.addDependency(dep);
					if(!this.state.module.meta.exports) this.state.module.meta.exports = [];
					this.state.module.meta.exports.push(name);
				}, this);
				return true;
			}
		};
	}
});